Web services = or != distributed objects?
Dave Orchard,
Jan 14, 2004
This is a bit technical but there is a key lesson embedded in the middle. "HTML, and HTTP headers and even much of the URI spec, have a rule that any unknown content must be ignored. So if any content appears, in any place, and the receiver doesn't know about it, it can validate as if the unknown content was 'projected' out of the instance.... Distributed object systems made a critical decision that any kind of extension required that both sides understand the extended interface. This is the fallacy of 'single administrator'..." Yes. Exactly. Now I have been trying to treat and design learning objects and XML shemas along the lines of the HTML 'must ignore' rule, not the 'single administrator' rule. Not everybody gets this distinction. But it is crucial. Fuindamental.
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